Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a6df37438415b1eae70204ad87a9a3c886f6f08680cceff07af0eb34ff35e22' 
  AND token = '05K8aya47U6Gfmxo5Qi9N06YvHWQJ4A3pDUK0ufgKiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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