Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f92b32dbf5264aa3df80ff11b6b54890fe86e60b599f3e9a55fece28ef2f542c' 
  AND token = 'cJMbEG8UvDBGZK4EPnOTEi7vqX0ZRQCR1UmBgq1L80Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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