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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4997b80f3455f5cff898956c2032f934a5071c33abb72743ae146da64b1c79d5' 
  AND token = 'izfzp4uccc+Q0jDGNwjuKnd/yt6M2jGXP0mxMSxhnlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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