Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69f82a3d461983b8a6eeefc73fd4940f85642a825b0c494a2c789e006168972f' 
  AND token = 'M3EihMUo6P04Uy3wTtz9zd4xnbMtTSfv14zPabtq8D0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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