SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09672da96ff33b0de5204305482db73584f6c71844e74704f3c6648333e24260' 
  AND token = 'YJhlTjlGjS6Ciw8VTvNBxdfrx5BCy0wHPY1XUD6lk+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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