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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4da81fc7d0ac209917dd2d4f5cb82f7a4445419a8c03a41733109052975394ee' 
  AND token = 'TRx4pZZLoh+e0BCl6anHXkfsAi6gbQFmfmgc14QE0vc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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