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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7286022379b745ece8490a7bded0e9decc47edf3f0700958d7e41b1b935dbc27' 
  AND token = '1KjWunI5+lGJj+uCXvGnA5PaZ0BsOC/ujc/4yymJBy0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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