Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c5da7c95c457d8c24c61e6f2c96e8b73574455d9362021c5a78aa52f522d892' 
  AND token = 'hbWL4wtZAuNJiDidqN5nBYmiQD3s91Z6XAOgvYSLoFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}