Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c940a3c7c529c7400154b8f9d75c1a425bbcd5bcbb4441d4d8595429f5a9225' 
  AND token = 'trKmTEG/A7VTOXsUPZmPqTQuqgR1rx4cnCZu3yAFRK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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