Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21bef7600d52f629188812b0be9d6e96968d58aea9bb34658405a650e1c00339' 
  AND token = 'zD/oCTXJHiC0g8gcroI5q74I8Rj95OsKF7ogsCj7KnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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