SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0779a8d8d18a0f82127ec190fcf5ac42c2db95b59e3bc53d6ce44a14f4e885f3' 
  AND token = 'HZfvM4YkeefXmt2ATzJ+GCRq8sKVojg+rD4NwytVDfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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