Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '403bfc2e042d312bda407044de607b15c2b829fef4529079ee7544f7adeda513' 
  AND token = 'FFLuS36cCwovE0T2v33fUqrcmECop0ZQGwigKK17NVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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