Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e900f69cea45abe801d514c71e285be0f692b09b45bf16dd7951b294dd5ecb21' 
  AND token = 'jUcHIr4ZYmZH/KErKCXc3h9JCCwRipftP0vZTjH1zZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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