Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'edfe52bbff472e9f12f09dc4408787580c9c99fb84fd50503586e8990b63d8dc' 
  AND token = '/ljmTYGqfyfZbLt2ckVqiynVLhj9bb90cftLASUEahk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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