Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7733c5cdbd4b7b3d0bfadb90f6152c4e8a63a9be11ce337c4891c902d3a6751' 
  AND token = 'J/XWz72gkjYsXOvgLz13exQCHW7+cDWeRj5sOA8rYlM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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