Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad8261fdbbdcfff4dd90d439bafa5809cf60d7ab36258ebf2b1b2344a246138b' 
  AND token = 'YXfOdHL0bbbPGZQAonav7nsl7NKBHRaU642e+KK+YRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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