Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a13cda33bd679dd7f98deb0ffde41f8cd17e5eab43bcbef2042fb1cb177e8f82' 
  AND token = 'PQuDNaoeZKsd2ln5lkr7mgqOVbEqODvrCSpmR3Xg7jE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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