Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4a622d27f62e746cb892152254fed9db4270f585b3e709d611ff685a3e6c47f' 
  AND token = 'hYN8CTA7Be1n8OtBGTKDyAJhskDGxIfCPcdcPsyuWDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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