Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b191293ecabb3ca1fb28db6c75321c6613a2ced86f301d7a394dbfb63f365004' 
  AND token = 'saqtq8WY9aTeyg+8yO8z8UVuvTamdOy1MVmOvid5jSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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