Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fad60726fe08f1bd0d7eb71f16ae3172dd047a7e735bbee8795c6e278b091778' 
  AND token = 'pmzn18SM3iB5lT0nW4JuuO3blSBbCjQdUrxKbr00YCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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