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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'baa0bb0d70511f3663f47ff3e9e4d6cf8e600b5691789b4e69142dfdb371c4ff' 
  AND token = 'ic3UnaSquc7Zqm66GtPN6LhjhYD3/f/HfBXuVKd0uY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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