Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af18828ca3cd90aa03126f5b4069ca73441350f1d71bd052856a2f8edf69aef4' 
  AND token = 'E0br37jJKz5iJzquvVSAYzqpIBTkctd4ikZOk80ZMAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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