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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be258ab972d409038946011a81af415e9716e99885864a9165bcc45950539cef' 
  AND token = 'zFVN1M8aFcGh4n+hY2XvPJkgl813sn6RH9bxoEsZRNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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