Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf8e85dbec818d3f7800234e48a013b80a72b068609c8bab681616dfb87108bd' 
  AND token = '4xSgELp1U+qRu3LBdpmhp+QY87oZT1appMzhVPFyktU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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