Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8701f9b30042918f03c446ccc72490ffea066faddaaa9d76731956d0942033d3' 
  AND token = 'rslrrJHQzcDhfuJ6sZxN16/SX0Nw7XutfbvWAuruXvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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