Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0438e3b1b4eaba317e721b10360426e56ef653b49e11189e129e75ae3b6eacbc' 
  AND token = 'ySTs9xcTWULvzq1V2MagIXNgxL97gOgcEGJcEyEY/m4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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