SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8277e967dd9d246bf934bc05bfd36b8576d6a311dbf54b0733448b0fa9190615' 
  AND token = 'JuQKV/+bGIwgSBTfEvG97T58PeYez08goYb/KZHnlhk=' 
  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"
    }
  }
}