Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e0ae7a755ad4c5dc9660f83f69f0142e047d04e8f1e9ae8e75ada6f6eb48165' 
  AND token = 'kndbLtNV44qRK2XzkwGNvwq2BQBTEXlOXJtBZCF4aFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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