Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef962823ef744b76c0d97adc783e352dcc95410f4060ad755cf538cef0f15af0' 
  AND token = 'RsBt9zlsjy7S4LOnwQkvl+88IkBiA6Rx8Ho1YH6SL0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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