SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1b6e3861da1621359863001b835fff982f830b3b71c9b6a4dd39c6c0b8d656a6' 
  AND token = 'hdX13qEJtYo+5UGBGHhLu5QsGQXvpNX6MiqXmRPCpXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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