Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '916cca173d075ef4ca565606e410406e958fde6f0b66b6c2aea84a1d666dc170' 
  AND token = '4W+oSXxhFoLVaeeDYYkrM+xMAgME+A8VKzCoxS32OpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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