SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '675dcaec730974f092a5a9d3c992c927370b9b805e05c3213aebb2a590b50b51' 
  AND token = '04FumYVUCawsQPg9PFtcdJqax/lZ+zmnXryyK2tHgZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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