Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19f1723d884ef2b2cb34264d1e4238cd1396827c322155dae90ecb4aba80cf4f' 
  AND token = '/U1i9AkhbBI3ddwTWHs9EW87h7OngpNmQ177eTSOnuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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