Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41842f8b3104de7f7e44d45798a7a92e29155b05c4a02153f555f3385fce3f71' 
  AND token = 'BgTdSXFsHGvCsvQZqeu8yFXO+G2P1JoUbOoNb2j7Lac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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