Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3797deeb365c65d434fdc4f7661e648a77eed5194e342d7d60290139bffd81fe' 
  AND token = 'aGQBb/OMy1c0tM7zZ+vAco8gbvN1zeDTCxrqViWK9vE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}