Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab9157628bf52a3c7aacc43a0e3e17602fcc2e6087a065ad36fe0141b67e2b6f' 
  AND token = 'CkQNxRpQ/r4OhoMM7eAZvE1/ydhWSaoyDbSayzEmbdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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