Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b709293c678f433f2500a34385c643365188429f18f4805f07d99a64af42726c' 
  AND token = 'uTJ9HhyUWKGnivSYjj6gT7U00g7psLcv23HhY9nRFWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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