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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3db5d44a698d6b2108916fb97dc9ce87537fa47379913abd9d67bfc29450c158' 
  AND token = 'QnPWf6Df4+9hx2pftKKJnU4kK62mLdnFBMofhdHwqxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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