Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cf3c32b7b67c9ee27a00ea45987f5cd675da9148c849fe97e8a2182fd6b31c6' 
  AND token = 'XJeMbPHE/prmzVEeVJ6SD7yquT/I3C2FBNQ9CIPTS28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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