Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e38d129cb8aaac893b9bc076835ead5e70611299e452d1686d7df1658406394' 
  AND token = 'xos6HAN9ZLZga19N5IJZUuVd32eIGLoqBHIdo4IrPEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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