Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2e5314fdbbd34ae74455555d7c12089861fb24a4f39ff918faf48614527cca9' 
  AND token = 'oIvzQvQFCMHCtNTNIkoSHa11tthLaRvWwVxJ8gVnGxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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