Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f1dd7a1e05e2c810e0f30f19002cd2598000f32dcf414ee4fb00254a359524e' 
  AND token = 'I99qlkJx1whaWXrP8unxqwxCxvrIPE4cpxgHsUzCQDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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