SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '26abf290fc52e77b89c56823c8edf22ae48f0a504e9977aa4f7cb6f6891897c1' 
  AND token = 'xjSl2q2F9evJ7U8sMwmBRuzJHaFZc4QGnC2Mhew0bJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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