Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '55d958a5a65e80648cab4eb48a3dd8883b8c62d807196f24f5bead7afc2d8efc' 
  AND token = 'KQzX/xVVhrxI5lkkuy1DW7tJiatwqIBqVzoapSheGbI=' 
  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"
    }
  }
}