Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49a8a031f970e921e9051caa9db656a49400b9f32641c66c773807af036b8908' 
  AND token = 'ozRrOH895Bff+P0sJoAmJ0UsueuEYA9i1YuaXjNePeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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