Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88cd7c3a443752db8fac591f86aca2123680a861f4d9df971f505989d4e67d63' 
  AND token = 'vgMEOswx3ez/lLe4t5j+Oswmc2g0/eer1RBgOjL677M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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