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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e72a692f45539c6536e990c2098d54481b6ad29430e2ab0abc7041ee53e13149' 
  AND token = 'H011HxyVmYOYKDS2ifjOOb64pk5x4uADb9RMNhGDwfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00357

JSON explain

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