Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84c9bac00b0897c9bbd2620cc405434074fca7b71d9d089d5e813131c7f74f63' 
  AND token = 'lbVs54vqU+d7VGKNRDr80nBSeCRD107fEH2O5pKUy4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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