Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd4cf67fe1752bee2f092683ee84df33345351507d37ebff3eeff4300dd502e27' 
  AND token = '2MuvY9H49XGak4Pj8Xvz/Nw4Ic591+4lUaJaKIOzh1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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