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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '44d5200cee236ef0706ad1decfb8c1649310fd076bb8acdf4b6d1f0469be19eb' 
  AND token = '4OEOIkaa6liTXu5J1NYj6UXxqzt05akp1JIkzE62CfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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