Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bfe0e62e366dddbdd414812b458f11e6d368ecec59c88a428f85621a721c241' 
  AND token = '7LudGFLUZNrQ7Y/pZbzw39E4HeDBX8FtMKhWFM1nOOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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