Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdeb6f5ede15e98fa34cd4f12dc478edb4d2880f8fd7b3eaa03da99da40bf57a' 
  AND token = 'zZ5L0JS/WJbPuK/t9hsR4zCHMAsgMOfcnolqFlgevI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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