Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc42aed0927d41e8c5d24a0a0cf8f1a4005a7f8585c7367b645fe8296b588aaf' 
  AND token = 'D0qPq635kiVF7Xp35rnLASiUAxV5JfexwY+EYzbO74s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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