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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12197acb308ad69e7ab307b02eef3d4a1e438207231525db806629d36ddd15b4' 
  AND token = 'H1qOdzQMnuYRn1qFNIoj4y2YBVmByZFXcMSJNq8zU2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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