Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c10a7e85e6111a2f7b1328390b11547b1939bcfd4786abe3824f5a58ec7c4ed9' 
  AND token = '0K3tDu1PC62NSR07MoTJmaO110aRFj3ICF8CevyrEzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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