Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e212ac6e191a452f560c34dd22319f4cfc2500b5fbb755dcb2e1e491f2cea7b2' 
  AND token = 't52fv8H53ksZOxWISZhR2D74k1WH2GmK6wbxDjUZ+as=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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