Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdb517ea7e2b32fae832352d1b8ee3853ae1d2ab775d0901f7bab49d82eb3add' 
  AND token = '63zhAsif7u5AnwtZJTxm9r7xYQMZz0jDSl/Mf3vyLho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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