Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d10673ffee4f7f48936ee2e6b2cba8e5ee1bb62bf6ead9630ce7da384567f8f' 
  AND token = '1CP/K4K7VXPVDI9of9CSSAEmguUtdDratebOMIyuykI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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