SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6b8b42db0a704506eb28bc73b85eb311f425066b19ff4cbc72b032a887ccd1f4' 
  AND token = 'igh4gTF/ZuOmBIdVSrvaZMWrCX1qyZ8xo9v2yZGgm9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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