Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cba9bb0b1e59dbddf8e2c86422b6463e9cc3878b46a105737bc87342e0a25f3f' 
  AND token = 'xF8QWHMDDaBEOoq4VH8pqXGqzfRowufCrXq3PlZRPCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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