Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0fbedafaad48027d634c3cfa3b872dc3467378a04c40d9a78ce60e7f719d40c' 
  AND token = 'Hyqc9FpCCSvemGSgde7zybf2RiIciGsiu4G2etou7O8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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