Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0eb343fc9d2ed6f913cc6d743d57857813c70f697e137d0bb28f5fbe7cc9f6b' 
  AND token = 'HNUhkJa4AOUzTjHhUcadvrIIbbNzrFjhKMxxMbreoe4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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