Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '520fc71c78505b37a6b2817ae84a4b8d3ccf24157996c6ff39c0116b83cfc690' 
  AND token = '4zURqSBQuaO7sNQNWv1fs1L0ogX4FvXQ3Iqfc3Rgfwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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