Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a3fb9fd55e663d7bf0e22b5d31009b532b664cb33b4dc4e3a611b4a4691189b' 
  AND token = '5BuHfTZMC/gb+njEZ9Jx5EPwR9PBg00aV7E2T2uSCNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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