Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d8e386b792ee6f74ad6ce3a7e64993037e7b52185ecb7fcac545166ab3ffce7' 
  AND token = 'A19ep+lAArldP7AnbHndp2iPr5/qZK8av0OuPjX2K34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00131

JSON explain

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