Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1e430fc772fb82659a3acb3ed50b9785e83939ce86b855505ecc13344676fee' 
  AND token = 'XtAEl1/AzRNZDdY8AXkxZle+tGWH/nQEWcZBiAJK6VQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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