Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1c49b4ba523441019084535a3e0f98f68a96cc8483a9b5e3786fa18117bcbdb1' 
  AND token = 'iiuNais5UHziOm0Ej8dI6Z8Z89Znyx5YeyaRvXMVM7A=' 
  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"
    }
  }
}