Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a78cd47e3defc361705e56315a2959d406aaa5db5be482912c7e646fa2dff412' 
  AND token = 'YTar0W+PhU35nC3xDPBtLjakN6L+lBxyzy5CdXNI3j0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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