Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a998049ca6856016777e489ef1328d90510a2b67e3d56798a0778b188c00b097' 
  AND token = 'vWxzry039cBwmehRp5ZAEb7dZ92qZaHMdHYhp5XJaKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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