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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e2b30a70ca562c9dc7c49e3830a88b8e25201d7bd2ae5c07640f1dd0f21fd3ae' 
  AND token = 'kaM0HDelaGz5lQ88P+QGRT7VazXikSt2H4LIsgSD2ac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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