Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9fcc0050d8b9c21cf5cd01794e094440a9678b2727d052d85fab48771a52d5d' 
  AND token = 'OurcfNEs6FbQQBrpZ6dtgJuCiBH3NvZU0txlkoeAh2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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