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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '46237bab237dfcd099f8867f41c01d565e3ada1a0917e9f0060bbd99a1f49002' 
  AND token = 'GQUNnWPL8RmSUTWzDexnVYOemAT6mSL+VrkdEGI8BmA=' 
  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"
    }
  }
}