Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '871da3d08edbaa1dc01fb0952eab051d6b5556fb4c4740696becad34e06c272c' 
  AND token = '/Eqi52ZWZuqUHTckBehKhpS5YSotB4sfhca3JSw/mcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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