Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0436c2f66de99c79d4bec3b9f35de8a20221d407bace853f38559bdd1c10337' 
  AND token = 'dNP+7Dsjua4DbUQ1bmTNcXq9JbwrWkNklX8U4J27Hpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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