Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cbb6e54e395b7258226ee9e90236a12f1ac151557cfcc0b1187cb022e593242' 
  AND token = 'd6Q8EGtpneEZrM72Lfv8S7FWND9mTpVIqizX4hcXYSs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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