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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5f901791774743369c979e7e9e774a63c92361c7bce869b6e0b509b7c5f6372a' 
  AND token = 'czi4ZshphhN8XowauRG1AjiZcw0fFliMkS9/pLbbHH8=' 
  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"
    }
  }
}