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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8985c98304e6411241a2824d742765071318ccc0212193cb11656996221fb7df' 
  AND token = 'NaNsA3dIUoFSP1FbVhEISPEPBxCqOMVi4u1IHabBT+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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