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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d9249c4b2d3fa3b02c6538bcbfc6a44b8f357b9d82177a366e27d7743ad541a' 
  AND token = 'NgPn59E50v6Aid+jfGBYIT9VfROjC0jKvo7VO41opN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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