Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecc3e0c3e71ae56908e5c34608834120f56165ae8cf4bd99711d70315fe449da' 
  AND token = 'DyHh1AhHYqV2Wwy6xN+H5T0/egyH8dS2VZePM7padW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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