SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'b5037a699fc8510116b4a07f8e28d935366a89e81609857c62f890b775c8d85f' 
  AND token = 'd3FHMsvRaSAmMV20+xQSsLIxZdDLzEhb3j/unMrKp/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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