Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ade68de37fa608a687754ba77b59b25b0a8718d86cfbc960036f9d3de0f6fa12' 
  AND token = 'O0UZ8h6pTlUJGixQJScWMhJCXJAbUNUM45vA5nr6AcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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