Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28cbdd3e58dfacfa81cfeb64ed19ffaa88fd3d32736407815122dd57a65de991' 
  AND token = 'lNS5G14bUCwKjB9osaYGeZeLt4Wp8UZtndd0Sa2f92I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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