Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '846ec5d0156c756e7007cf3d475634a876bb34884b6f4a111e473f68ed1a3041' 
  AND token = 'Di4CYL8C/a/P7PEHny+yqgx5tjRCcG0BsD85T2WJQI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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