Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba300cc1fc86330668968eb117904a9553515b4d3a51d41b5173eeb93aab9617' 
  AND token = 'Q//ZGRom+rUeDnH5iAFMAetNryNYhespKriYZWXOnlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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