Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3f6fe9d0dedcbbf9bcb32db518be0e7ff3484da797da093f43ac9c9b9d94d851' 
  AND token = 'gxW2XJR0UfxOH6xKWdFSpJKhjYWBIaxRVZSMtPqpNs8=' 
  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"
    }
  }
}