Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0615ee02860e898510399b1f99ee43caaeb113f880506d5f915f42193afccae' 
  AND token = 'lEFiotD8fnn4KrfIilYykayp6wrdWkAvnmhUluJHWZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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