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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c82ddd2adc2fd54fdb0462acd9f1154fe7b01751f31ba8fc0c6414ddb5d8693' 
  AND token = 'cw3CafgEPaXLN16MaDbrPgCuKy/Xs/Sr6V2QBoXAzys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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