Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41b60dfed2d59c829a77245f5e7e2c8df996e69df29add91bc9c7984ae710c26' 
  AND token = 'SVPMq/IUy1nqrJlLWHLcwDmivxujOTlnN0hkpgdWZeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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