SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '888616cc4f55a4685c5ad229fbb0170700d89844df75699b77ad1557d803462d' 
  AND token = 'YpevaqyKDcsU0FZU/jv7EgOtbiBQwFk6+fnt3zwVv2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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