SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aca2020afce3567aa1ff38c8cc02f612a77f19e09230c877e5756dfafabfa716' 
  AND token = 'cfy3fmhRc677FvzrjxTAf4WZHmrnAXPmXZm36ZrhJ+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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