Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c2fd06faabce3524ffc4bbca793e5f8634f13a2dff0b494398eeab7270bae97' 
  AND token = '+NOQZx3HWlmgONAB6SCGQ83q9MQPdDYsUxusj1xoK3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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