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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7c7007fd582ba8365f0e20f1f4bdaa118f12f120192424bdb8d89fe4660099a' 
  AND token = 'ADO384oDpGvoCF+XJFkOj9IULQ/RygCLYi/K0e6RAYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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