SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '54eee2aa445fbf45701979a81b693e7c020d6ccc52619c6069a1f524d8b57c86' 
  AND token = 'ZBmMQIoCL1PJKZ+aYmY8T/S+6EMWrhSWXH4otXBKBJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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