Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c651a6cfab4bb64c39cbfdf9c9d0b7e07e84e6f4947ffa75afd0f4748ad9920d' 
  AND token = 'aKlaq+u4/MotSXX85fcibFzrAqWZs9sNRHpiqMYBcUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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