Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1cbaebb9d8052e1023e313bf413895d01aaa46e0fb9cdb636419d4a918486a90' 
  AND token = 'AzI73n4MMTXJ6ffXuC3iBRqU8P0d1O2LgS7IXttNxGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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