Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc2f8d05a09e5cb7bc5381a53ff9aea88fd62eddfaa8da3188a68efd176beaec' 
  AND token = 'xkm8+0yYpdlC0DFLJ8Z0ve1tTEX3vCMIuNqtyx6bOvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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