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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6c4efe3e17873fe3b48690f68a9f0bc2af46a33e5cceb0d9764f7dd2d8db85dd' 
  AND token = 'Dt8OqgW9Ny8NV5/oU6kUQedo4yUXJKmHpfQCyx8+jbU=' 
  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"
    }
  }
}