Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd46ea27e1767667fd16b289ce510ae978f658660f37342e64d85e5b628c35eae' 
  AND token = '36iTk/T3u3KjoehH1+lI1Qx+UioU+QjUfE1i96c9JLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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