SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72df25bbbb21c2e6ba31ca2646f3025ff8c4547187b97599f62f4c910dbf32f4' 
  AND token = 'ZGLzf+S5/q+ev18p40KtHS9HMp8K+lu7RvUetSo46qY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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