Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '221c4ae20c84454a42c3d22d24e9b726414885838e30a0149d0008481471aaf7' 
  AND token = 'OPE79FXd+AACkDKvlcCSnBulC4RTcXSfqDvCr0rYQzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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