Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aad90345b8168683299f13b2ef6ef5177e145bc3a5b2b378625a78452e7d3eec' 
  AND token = '0/OhDAlliMY2yHZCqfLsctQbyoH6eJvmXX6YpoBeUaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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