Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4ecace415b5b6bb92276cb33b39514cb8c8d0df2f12b3cf477d506972f270d8' 
  AND token = '0EGvwwTk7joGKUIUcLm/92WixRkTAG0F/GGStA6eics=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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