Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0f88b252bed94e99305cec0bbe4aca53d32d17b6b631078523395de6629a5e9' 
  AND token = 'cv32eonyk4/7QB28M49xQEETqDf9N8Tsrq05Pe22UEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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