Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c936672627aec5da85c1945a55a02b85cb33c348b1cddbbad1f4642f94fb61d0' 
  AND token = '0nNVdJZtuSgQlgZp4UDXAE3SvdPXH5IBuDVL+aVr940=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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