Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dd633dbf2456e9ef1623e7835c583e12b9726a49efa8124fe56e3980612562b' 
  AND token = 'HRgxG1okxuwea7Ax5VMPmDFWEV3Ya059+P6mn+B3vaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}