Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'b52498645e562ca077dfdd58f502e771b75ea5ad0c58455499de64f38167b4db' 
  AND token = 'Yz628+QhTbsCSTqE6bcwlzVfwmOP+KV3fEI70NlvM7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}