Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '171adab1911baa06bca0782fb284950b34efd85d1d289f7c8cc896723c8dbe0d' 
  AND token = '1iGmRl3bVBRGByRPq9r661MfITGm6H+H31N74k0/KTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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