Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35638ba700b4fadd1a015a352d0aea22041df50a86591d553b6be866eda8896c' 
  AND token = '20RZtMOcoSoglLu+csdKTqy/yXvmAfkwPgD1HBWWQ0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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