SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22545d93560ea3003b9ecb4a822f1eef560db1f13dbb39e4645f547ec5ece64f' 
  AND token = 'TQjKrzF7/FomRu6cRfngmGmTQ6bPYs7+sqqyBIKoeF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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