Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '977bc5479325911f317a770e92fa6f4fe1787c8d74d486474833d3874191f8e2' 
  AND token = 'rrByVMCNwbw2mPvPkvoN7BSieVP6XZfmH/nIQe5IPxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}