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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc90660e8681876c3af291ba4a673f0acbcb08203027e30c839693c7716e5822' 
  AND token = '/WxP3h259v2MV5Bto6+CD4NHIYMNSkUIOLCSThGHCnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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