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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec3f649bffada9a46dc19a3f28ad0f44e086214ac6c3966ade8bd6e4e9b562e7' 
  AND token = 'CIYOwczbKPFHElksF7BKKAUerypDeERzdK9EQjiRpQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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