Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bdd32a17f5402404032ec1f8c5a16465f47b3276e5f5c7d20cb7d79ae756e01' 
  AND token = '4u0vWtcD07/ZzJYwH8hnd9iLav0nVEm2Ux+udp16VsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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