Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc9316a7d5de1cdd50972163caa2d532ab3c61686ab9d0bbc08e341289f5b572' 
  AND token = '23Cg1Jp6c7pz/4uWgZhBo4oeSaCTUObzS6seT8A4zvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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