Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02edd6466fc85e7446037a3425105cddf89ac51e0eb27f794d3ecb9a4f265b26' 
  AND token = 'F8P9keda9fW7ign+VvVj7KO8LlTwFfRtDVNC8oQ6acM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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