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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb80ca2eb3e774ff0cbb8e806a5378af469f510de94cd258a3d7ea177aaea316' 
  AND token = 'bXPxh//fYHzfIBupKWPKU1V1RJ7G995U7yMt5659A6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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