Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '960730692bd99f91b5f939f12efbf89995e341326d7b0044a0d74b0c4dfa285d' 
  AND token = 'Ew8Fj+nB/0h/SOixhbIXPkFncdsWdtPWZta6I8+F/B4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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