Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9881335e6fa775acd82b434dcc510dc2cd4d2748bc2654c5dd97f0aea6ad86e8' 
  AND token = 'DT/OjOYovMXh5pReZAHdhMiI85RoVLRwB7oXWHt18Mc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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