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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07c6ca2bd499a4a18a79c3a0714c58d85f4d7a02f55c7fc6f7a8e5fcfd5ee3ee' 
  AND token = 'LEYqzdR2ce1qChrMf/zDnP6zqF9LH06CuscRYcoxCls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00196

JSON explain

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