SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6c0e3525161fcf62e07d5c6401bc122b467f9c3eae5daffeaf80b90b9f5bec89' 
  AND token = 'EBGUWlMSLP3jVcWFJeGPOhXpIRF4wH4VgrkxXYYGyZE=' 
  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"
    }
  }
}