Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '27a9f4098e682f5d0bc9f25a89820af015d4eb14eb49adc11e35cd4f8b2bc4a7' 
  AND token = 'N2IYVm+96saZfDbTT4IExO0TumSLl56JGQfw1sEq5gw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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