Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38f230a4cca197c1597a30a308d8e2f6be7dfbba7284343788037f6553bae828' 
  AND token = 'J7zv9IhiBHmfiJqumGppG4m0O4MSX57mGqFz5TAxWqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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