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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1b02eaed3eb9a71c4ef68e8a07d5ddd446c74641bef3bce134d9cb17fe40425' 
  AND token = '8IT+iFdV1p11dtV+a7c4qRzr/wdpmuiO0pPv0yrPje4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}