Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '887a4e159e6a2c712522768244ec60d4c9d5c05007fc522dc28db45c4e4fc0fc' 
  AND token = '8p1efoc4FN220QgnRD+Y/lWf2iEBpjPqPHqM8FB1Jmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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