Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15151a4fcd2d3faa1599496954a9fd1f9a05423e947d094dc689d68503706750' 
  AND token = 's2MKsMcjaaN7bNAyFAeJrwwBIesQp2OdQZQU6mw/HsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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