Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e651b59f9474c7b76a34166f29031a0936ce1d72abd72f21b3b484a683d953ba' 
  AND token = 'wR364nYT5LuznAKn+QGQAEHXip4o1el61ZTrBL6T8+U=' 
  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"
    }
  }
}