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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4489f4711be61bbf7d5340d933cef99bc715157af1eb40681809048d57081e47' 
  AND token = '/Brjg9DD17HzA53DUcep0zI/s50S7IbOjiZUnBZ8Dc4=' 
  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"
    }
  }
}