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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e241393eee915efbe96ea9fafed4b5c507918338d0db6b3f1d86f5d8866551b7' 
  AND token = 'fakuWE++A2u24Hje1y+7KMTx9odf5fsC65OjUfeQK+4=' 
  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"
    }
  }
}