Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6b159fcb240f3467e28ce750de92fc38801445be6913549677fc1b10732698b' 
  AND token = 'CYUhPHIN3sOoy1NrBbQjqxT344JYvOcr7lcDU/0ZvRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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