Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b49a77bb084ffbf1068bdfc189386862a3b5789ca537af0ca6984a68d36b4b9' 
  AND token = '/RI5cwBKSHxgx+HM35mN6/wUywl17Lf2ENG2q2M1UN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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