Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe0914da416dc6e865576e2af7d19398c95d41d7663169a1e711fb9cdd19baa5' 
  AND token = 'JLQk2w3fX/3i+VmI6ywMiTuzLBRsCKwXf5wfbHwIPnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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