Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a54db7cb15ea1ebd4a080f1f010dc1509ac6ee0b01413ae58f6dabc9edadbb4a' 
  AND token = 'fk2VRCleHOgDh2q22zMaxcQPjnHidJXVnEAVHHH6Ypg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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