Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21ca73122295085e92b8a935437a72501c8ea87908fa6ea8b3a389eb8862f55c' 
  AND token = 'ZYNL32kC7l4afjkxRP4kkWYvTt5RoZN30+l3HAUAV5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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