Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59325d74609537547bfdad15cab7691a2b2986e6cdc45026735faedcb7e6f52b' 
  AND token = 'kgGcqw7XkGdf2ztl/M1PlUwiGD07edvT+bRCEnHgXx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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