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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '86ab0263c39e23453b8068996660da2b91d91296b462352dd3ed67c8a2adfd5a' 
  AND token = '1QZDjl2E6ZfGxka4Xk2o6LJpKwvBZ+2FRY9kfXb2qJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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