Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cfcf23494db3b983c5ba5687567133dbd3c89ee07154f9ff7d100cdd551ef05' 
  AND token = 'yfNKyU58xl3fa+/BgqztMnnTQgNqTT5Hb6G3Y5rgCKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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