Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e466c5aeb918fb17b7b46aeecb25e652f5ec350d0c8f9598e778fabb8735cf7' 
  AND token = 'em1ZXDXnl9Ipmh7eksn65ift4Ej+GdxC1ZW00x8r7zQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00160

JSON explain

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