Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25762061042abe6a902dd200bbcd90cf6aa6de39670b9a9483275046e7300d4c' 
  AND token = 'GDgLVOXOA8lrBrhb7wMd79lBBww2eMqM3DFSYOff1Pw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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