Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55e9bba85ceabe3980c86e6e60e6fba57bb3e70987570c1bf2bd99822fe7ec68' 
  AND token = '6auMY0tLDEc3VTgVBSa96MXtRyd69h8T1iDpf43sn8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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