Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0189e3c2a3a5e0925559fe87be053f56eae514a3edb96649064751244e839d6' 
  AND token = '0XSFQvmEMMN1mATkwqooBg8CFjrfq+WTw/ST4tHgQJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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