Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8d45f44040cea0b6a39be7183569722beaa2bbb83d444c55bfd8be884a7e5f6' 
  AND token = 'yOiMw9VtOywH20Q50G7OonLmdiXgNByblTxoX67gJPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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