Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca9cad024aafd70974836b48b415b9f86a66bd29fb8e8411b37a49655cb8afe1' 
  AND token = '4rrpeLiWZdFB9JjXLEaC/lAAg9YJd0bjdBppN+cNEQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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