Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02282f3e328b18a73bc32d8497f3150d213959dbda50bbd1ba9e4e9d9ff58dd5' 
  AND token = 'oBfRFHIZzxXnpM9iyx92wACFtFk4W2Y7geAOrP7k9r8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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