Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2ccf174baa5b3c0609802a446b1cf21721369e287d2dd31ebe71186a6a88e4b' 
  AND token = 'IQVp8yUBi1HrmCcrFGHH1MALl/zxhlkwOb637cjtdfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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