Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c4680099af51d310e9066d15ae6c01ec19967eb57529c697bc00b4ff7feffc6' 
  AND token = 'BY4mX4fvEhPSWBj6y94PigMG4QfXzFXEY9W9RyMZHnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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