Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25bc527b33383c1de7300e58c9e65ed7199ab16c05d3304b723dee1d9f99a6ec' 
  AND token = '0u1VJiGsSe1FUVNsVi+Wk4+v0eLOq6sjh2AmGsjWr5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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