Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5549a2b5107052c314800e04c11b0fcabcb47cf8329f912ff4b2531fcf35e82a' 
  AND token = 'N3O/T6iA0DWxp1Y/taT0OomdJdkYwUr+TX2TdD1iq6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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