Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbb93a111b7a72b1be2be4519971da42dc8632d7f25df7ccb31b8b495d595787' 
  AND token = 'azXFbMYIyaVLgbPGquc5Z8Ps1rKO5ofhEUEmHv9gtAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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