SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdb159ad1ddfe468d87b30f113965a4ca4be9a5173bf6b8a3afd991fdbabf1cd' 
  AND token = 'VJQj5gr8Hrr+FlwpPQYGWk6xLRc/Yxul/v2xJfDdqAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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