Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36ee8f2394abc73ae0ede0dbee32e7e049c31ad439d0da5bbb2573a24349d67c' 
  AND token = 's3u8OvR4Wp/2oJXM0WuPOvo5YuSE9R1+hhEkW57S8Og=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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