Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '288569725685229ab475a2c99663d1e7cc6c81abb7da5ce0abba205b2a790538' 
  AND token = '2acbaz9iQ0pJrQ8ZrpywSqnpwmufPJO1eOqT0wiUMJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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