Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29a1bdc6313ca11d50434c8b7ee19a28c4f74d8ce09b3da0e6ab59a6a45a2bda' 
  AND token = '5ob8opUwwdzsrorAeDaVboodrHnILoKO7ALG5vciSSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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