Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd11aebbe2f04bb48509f9742572f12cfa15ae9604444a3f260335f52f14f57c' 
  AND token = 'd3QlKpPt6wcILV+rJisIUGn+ixjKAzf0O/kZNkc3dsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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