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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b09d81285b95b292bbcf745a9f0e6ff02641cf8812024f50e5b952fe5d436b3' 
  AND token = 'TVWnA8Nwju+9gcDjePofD+P1OkBNh4CPKBUov88Js9A=' 
  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"
    }
  }
}