Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5b54e543e060aadea3a423656168ae734157c7b019919fa0c05326b26f929e0' 
  AND token = 'TkktFhJwlHUzeADCISrpxhhlN0d444qUrt9HQySSFpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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